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在现场建造LiCl丰富的人工固体电解质介面,用于高性能金属阳极

Zhen Chen¹, Xi Wang¹, Shengjie Qian¹

¹Key Laboratory of Engineering Dielectric and Applications (Ministry of Education), School of Electrical and, Electronic Engineering, Harbin University of Science and Technology, Harbin, 150080, China.

|January 26, 2025

概括

研究人员开发了一种用于金属电池 (LMB) 的新型人工固体电解质介相 (SEI). 这种富含LiCl的SEI层增强了沉积的均性,并抑制了树突的生长,提高了电池的性能和稳定性.

科学领域:

材料科学材料科学材料科学
电化学电化学电化学
储能储能储能储能储能储能

背景情况:

稳定的固体电解质间相 (SEI) 形成对于高能量密度金属电池 (LMB) 至关重要.
树脂的生长和低库伦比效率是LMB的重大挑战.
开发有效的人工SEI层是克服这些局限性的关键.

研究的目的:

提出一个简单的现场策略,在金属表面上制造富含LiCl的人工SEI.
为了研究这种人工SEI对沉积行为和树抑制的影响.
为了评估金属电池的电化学性能提升.

主要方法:

在Li金属上使用MoCl5反应 (Li@MoCl5) 在现场制造富含LiCl的人工SEI层.
在高电流密度下的Li@MoCl5对称电池的电化学测试.
在高阴极负载下,对具有Li@MoCl5阳极的全电池的组装和循环性能评估.

主要成果:

富含LiCl的人造SEI显著改善了沉积的均性.
观察到有效地抑制了树状石的形成.
Li@MoCl5对称细胞在10 mA cm−2.2.2下实现了4200小时的稳定循环.
完整细胞表现出卓越的循环稳定性和速率能力,即使在高阴极负载 (17 mg cm-2).

结论:

易于在现场制造富含LiCl的人工SEI是提高LMB性能的一个有前途的策略.
这种接口工程方法有效地解决了树石的生长问题,并提高了库伦比克的效率.
开发的Li@MoCl5接口显示了在先进的金属电池中实际应用的潜力.

关键词:

人工SEII是一个人工SEI.在现场制造.富含LiCl的不同阶段.金属阳极是一种金属阳极.统一的Li存储方式

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Formation of Complex Ions

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